Brazilian ultramarathon runner Débora Simas is attempting to break the women’s world record for the furthest distance run on a treadmill in one week.
The effort highlights the physical limits of human endurance and the specialized logistics required for extreme athletic feats. Simas is using the event to showcase her specific strategies regarding nutrition, sleep, and training.
Simas, 55 [1], began her attempt on Sunday, Aug. 2 [5], inside a shopping center in Florianópolis, Santa Catarina [2]. The challenge is scheduled to run until Aug. 9 [6].
To achieve the record, Simas is targeting a distance of more than 800 km [4], with some reports indicating her goal is almost 900 km [3] over the seven-day period. The scale of the operation is significant, with a support team of 110 people assisting her [1].
Maintaining such a pace requires extreme sleep deprivation. Simas is averaging about three hours of sleep per night [2] to maximize her time on the treadmill. This grueling schedule is designed to push her body to the threshold of the current world record.
Because the event is taking place in a public shopping mall, it allows for continuous monitoring and public visibility of the attempt. The athlete and her team are managing a strict regimen to ensure she can sustain the distance without injury before the deadline on Aug. 9 [6].
“Débora Simas is attempting to break the women’s world record for the furthest distance run on a treadmill in one week.”
This attempt represents a intersection of extreme sports and sports science, where the focus shifts from traditional racing to the management of biological recovery in real-time. By utilizing a massive support team and a public venue, Simas is treating the record attempt as both a physical challenge and a demonstration of high-performance endurance logistics.
